Alpha Pro Peptides scores higher than PSPeptides on our transparency method (7.5 vs 7.0). Its testing page lists a lot ID, date, purity and measured net content for every certificate, and we found no dosing content on its site. PSPeptides posts more certificates and offers international shipping and the widest payment range of our eight vendors, but its blog publishes human dosing guides. We have a code for PSPeptides only: CHECKED for 10% off. PSPeptides is #3 and Alpha Pro #8 in our editors' order, which isn't sorted by score.
Notice: Research peptides are sold for in-vitro laboratory research only. They are not FDA-approved, not for human or animal consumption, and this page is not medical advice. This comparison covers supplier transparency only, based on public documentation. We didn't purchase or test products, and we don't repeat dosing content.
Side-by-side
| Alpha Pro Peptides | PSPeptides | |
|---|---|---|
| Transparency score (method) | 7.5 | 7.0 |
| Stated location | US; Florida-law terms; no address on site | New Jersey; no legal entity on site |
| Business age | Domain registered February 2026 | Claims 5+ years; domain registered November 2025 |
| COA format | Lot ID, date, purity, net content per row | ~60 products, dated by month, test ID per file |
| Lab on certificates | Freedom Diagnostics | North American Diagnostics |
| Lab named on site | No | No |
| Finnrick | No profile | Profile, 0 tests |
| Labeling issues | GLP-1, GLP-2, GLP-3 codes; capsules, sprays, serums | Human dosing guides on blog; "Shred Express" bundles |
| Ships to | US only | US, Canada, EU, UK, Australia |
| Free shipping | Over $199 | UPS 2nd Day Air over $200 |
| Payment | Cards except Mastercard, Apple Pay, Google Pay | Cards, Apple/Google/Shop Pay, Zelle, Cash App, BNPL |
| Trustpilot | No page found | 4.2/5, 175 reviews |
| Our code | None | CHECKED (10% off) |
| FDA warning letter | None found | None found |
Sources: Alpha Pro testing page, Alpha Pro FAQ, Alpha Pro terms, Alpha Pro shipping, Alpha Pro WHOIS, PSPeptides homepage, PSP certifications, PSP about, PSP payment options, PSP WHOIS, Finnrick: PSPeptides, Trustpilot: PSPeptides, FDA warning letters. All checked September 26, 2026.
Labeling: the biggest gap
This is where the scores split (7.0 vs 5.75 on our 5-10 scale).
PSPeptides carries research-use disclaimers, but its blog publishes dosage guides, including a retatrutide page titled "Retatrutide Dosage: Week-by-Week Chart 2026." Its shop lists bundles named "Shred Express," "Cut & Glow" and "Turn Back Time." We treat dosing content as the most serious labeling problem on our list.
Alpha Pro Peptides has strict terms: buyers must be 21+ and represent that they're affiliated with a laboratory or research institution. It loses points for GLP-1-class products sold under codes (GLP-1, GLP-2, GLP-3), consumer formats such as capsules, sprays and topical serums, and a reconstitution calculator with insulin-syringe settings.
FDA has said a research-use label doesn't protect a seller whose content points to human use (background). Both sell GLP-1-class compounds.
COAs and labs
Alpha Pro's testing page is a table with one row per certificate: product, lot ID, report date, purity and measured net content. Its BPC-157 10 mg certificate is from Freedom Diagnostics and reports 99.24% purity and 12.99 mg net content. An independent PeptideBenchmark review, which discloses an affiliate relationship with Alpha Pro, matched 35 reports to lab-hosted copies. It also found a 50mg product page reusing a 30mg certificate, and no sterility or endotoxin reports.
PSPeptides' certifications page covers about 60 products, dated by month with a test ID in each file name. The page also mentions heavy metals, endotoxin, sterility and fentanyl screening reports. Its August 2026 BPC-157 certificate is from North American Diagnostics and reports 99.95% purity. The certificates we opened listed no accreditation or verification key, and the site's Verify page checks orders, not COAs.
PSPeptides scores slightly higher on COA publication (9.0 vs 8.75) for volume. Alpha Pro leads on lab traceability (8.25 vs 6.75), because a third party matched its reports to the lab's own copies. Our COA guide explains how to check either.
Independent testing: a tie at zero
We found no Finnrick profile for Alpha Pro Peptides. Finnrick tracks PSPeptides as "ProSupply PS Peptides" but shows 0 tests. Both get the floor score (5.0). See what is Finnrick?
Business details, shipping and payment
- Alpha Pro Peptides publishes no address or legal entity, and its domain dates from February 2026. Its FAQ says orders before 2pm EST ship the same business day, while its shipping policy says processing takes 24-72 business hours. It ships by USPS, FedEx or UPS within the US only, free over $199. There are no returns, and damage must be reported within 48 hours.
- PSPeptides says it's New Jersey-based with a 25-person team. It claims "over 5 years in business," but its domain was registered in November 2025, and its US manufacturing claim is unverified. It says orders before 2PM EST ship the same day, with free UPS 2nd Day Air over $200 (fastest shipping).
On payment, PSPeptides takes almost everything, including Afterpay and Klarna. Alpha Pro takes major cards except Mastercard, plus Apple Pay and Google Pay (credit card vendors).
Price and codes
Prices checked September 26, 2026 (cheapest peptide vendors):
| Item | Alpha Pro Peptides | PSPeptides | PSPeptides with CHECKED |
|---|---|---|---|
| BPC-157 10 mg | $49.99 | $89.99 | $80.99 |
| TB-500 10 mg | $44.99 | $79.99 | $71.99 |
Alpha Pro is cheaper at list price, and it was showing a "Buy 1 Get 1 Free" banner we didn't test at checkout. PSPeptides code: CHECKED gives 10% off (PSPeptides coupon code). PeptideChecked may earn a commission if you use it. Codes don't change scores.
Which should you choose?
- If you want lot-level COAs with net content, no dosing content and lower list prices, Alpha Pro Peptides scores higher. Accept that it's very new and publishes no address. Visit Alpha Pro Peptides.
- If you need international shipping, a specific payment method or a larger Trustpilot track record, PSPeptides is the only option of the two. Weigh the dosing guides. Use CHECKED for 10% off. Visit PSPeptides.
Either way, match your lot to a dated certificate and confirm it with the lab. For lab-handling unit math, use our reconstitution calculator.
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